CHAR_TO_BYTE_SAFE  223 src/character.c       int cu = CHAR_TO_BYTE_SAFE (cm);
CHAR_TO_BYTE_SAFE   62 src/regex-emacs.c #define RE_CHAR_TO_UNIBYTE(c) CHAR_TO_BYTE_SAFE (c)
CHAR_TO_BYTE_SAFE 1896 src/syntax.c   		  int b = CHAR_TO_BYTE_SAFE (c1);